Table 1

METAVIR score

		Lobular necrosis^1-150
		Absent	Moderate	Severe
		0	1	2
Score A (activity)
Piecemeal necrosis^1-151
Absent	0	A0	A1	A2
Minimal	1	A1	A1	A2
Moderate	2	A2	A2	A3
Severe	3	A3	A3	A3

Score F (fibrosis)
No portal fibrosis		F0
Stellar portal fibrosis with septae		F1
Portal fibrosis with rare septae		F2
Numerous septae with cirrhosis		F3
Cirrhosis		F4

↵1-150 Lobular necrosis (LN): intralobular necroinflammatory focus (foci). 0, less than one LN per lobule; 1, at least one LN per lobule; 2, several LN per lobule or confluent necrosis or bridging necrosis.
↵1-151 Piecemeal necrosis (PN). 0, no PN; focal PN in contact with a few portal spaces; 2, diffuse PN in contact with a few portal spaces or focal PN in contact with all portal spaces; 3, diffuse PN in contact with all portal spaces.